Decoding algorithm research for unsynchronized OFDMA signal

Asynchronous orthogonal frequency division multiple access(OFDMA) signal decoding algorithm based on independent component analysis is proposed in this paper. The proposed method can be used for the multi-user OFDMA signal blind source separation and decoding without any information of transmission delay or carrier frequency offset. The proposed decoding method does not need to remove the cyclic prefix, which increases the energy of the received signal, and the decoding performance improving. Compared with the traditional OFDMA signal decoding method based on fast Fourier transform(FFT), theoretical analysis and simulations show that the proposed method has better performance under the stable channel environment.